nationalism

: a feeling that people have of being loyal to and proud of their country often with the belief that it is better and more important than other countries

: a desire by a large group of people (such as people who share the same culture, history, language, etc.) to form a separate and independent nation of their own

Full Definition of NATIONALISM

1

: loyalty and devotion to a nation; especially: a sense of national consciousness exalting one nation above all others and placing primary emphasis on promotion of its culture and interests as opposed to those of other nations or supranational groups